package com.mvvm.api;

import org.json.JSONException;
import org.json.JSONObject;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import sun.misc.BASE64Encoder;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;

import javax.net.ssl.HttpsURLConnection;

/**
 * 获取token类
 */
@SpringBootTest
@RunWith(SpringJUnit4ClassRunner.class)
public class GetTokenApi {

    /**
     * 获取权限token
     * @return 返回示例：
     * {
     * "access_token": "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567",
     * "expires_in": 2592000
     * }
     */
    public static String getAuth() {
        // 官网获取的 API Key 更新为你注册的
        String clientId = "BTjGTzQuZRfOVBSp3bZxh5qM";
        // 官网获取的 Secret Key 更新为你注册的
        String clientSecret = "prNHT1ZZjz65MDS96CcS9t8HjfaFki8E";
        return getAuth(clientId, clientSecret);
    }

    /**
     * 获取API访问token
     * 该token有一定的有效期，需要自行管理，当失效时需重新获取.
     * @param ak - 百度云官网获取的 API Key
     * @param sk - 百度云官网获取的 Securet Key
     * @return assess_token 示例：
     * "24.460da4889caad24cccdb1fea17221975.2592000.1491995545.282335-1234567"
     */
    public static String getAuth(String ak, String sk) {
        // 获取token地址
        String authHost = "https://aip.baidubce.com/oauth/2.0/token?";
        String getAccessTokenUrl = authHost
                // 1. grant_type为固定参数
                + "grant_type=client_credentials"
                // 2. 官网获取的 API Key
                + "&client_id=" + ak
                // 3. 官网获取的 Secret Key
                + "&client_secret=" + sk;
        try {
            URL realUrl = new URL(getAccessTokenUrl);
            // 打开和URL之间的连接
            HttpURLConnection connection = (HttpURLConnection) realUrl.openConnection();
            connection.setRequestMethod("GET");
            connection.connect();
            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                System.err.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String result = "";
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
            /**
             * 返回结果示例
             */
            System.err.println("result:" + result);
            JSONObject jsonObject = new JSONObject(result);
            String access_token = jsonObject.getString("access_token");
            return access_token;
        } catch (Exception e) {
            System.err.printf("获取token失败！");
            e.printStackTrace(System.err);
        }
        return null;
    }
    
    /**
     * 
     * @param image 图片存储路径
     * @return result 解析结果
     */
    public static String getBussinessCard(String image) {
    	String accessToken="24.2224be8307798e42fa2227941752954d.2592000.1537949003.282335-11728479";
    	String url="https://aip.baidubce.com/rest/2.0/ocr/v1/business_license";
    	URL realUrl;
    	String result = "";
		try {
			realUrl = new URL(url);
			HttpsURLConnection connection = (HttpsURLConnection) realUrl.openConnection();
			String img=getImageStr(image);
			img=URLEncoder.encode(img, "UTF-8");
	        connection.setRequestMethod("POST");
	        connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
	        connection.setDoInput(true);
	        connection.setDoOutput(true);
	        OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream(), "utf-8");
	        out.write("image="+img+"&access_token="+accessToken);
	        out.flush();
	        BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
            /**
             * 返回结果示例
             */
            JSONObject res=new JSONObject(result);
            res.getString("word");
		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (JSONException e) {
			e.printStackTrace();
		}
         // 打开和URL之间的连接
    	return result;
    }
    /**
     * 图片转base64编码
     * @param imgFile 图片保存路径
     * @return base64编码
     */
    public static String getImageStr(String imgFile) {
        InputStream inputStream = null;
        byte[] data = null;
        try {
            inputStream = new FileInputStream(imgFile);
            data = new byte[inputStream.available()];
            inputStream.read(data);
            inputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        // 加密
        BASE64Encoder encoder = new BASE64Encoder();
        return encoder.encode(data);
    }
    
    public static void main(String[] args) {
		System.out.println(getBussinessCard(""));
	}
}
